The growing popularity of wireless networks, and the peak in the present era, so as to attract the wireless user, regardless of their geographical location. There is more and more mobile ad hoc network (MANET) the risk of security threats. One of these security thread is Black hole. In this type of attack a malicious node falsely advertised itself have a short and a fresh route to a destination and absorbs the all packets itself. In this paper we see the effect of black hole attack node under the AODV routing protocol. Protocols consider a comparative analysis of the black hole attack. Manet Black hole attack performance evaluation, agreements for exploration of the effects are more vulnerable to attack. Measurement of end-to-end throughput, latency and load optical network, packet loss. Simulation is done by the optimized network engineering tools (OPNET). The extent of this postulation is to contemplate the impacts of Black hole assault in MANET utilizing both Proactive routing protocol for example Advanced Link State Routing (OLSR) and Reactive routing protocol Ad Hoc on Demand Distance Vector (AODV). Near investigations of Black hole assault for the two protocols were considered. The effect of the assault on the execution of MANET is assessed discovering which protocol is progressively powerless against the assault and what amount is the effect of the assault on the two protocols. The estimations were taken in the light of throughput, start to finish deferral and network stack. Reproduction is done in Optimized Network Engineering Tool (OPNET).